Download Event Information
Origin
PublicID |
2015p076705 |
UTC Time |
2015-01-29T09:07:49Z |
Latitude |
-32.74 (± 21.7
km)
|
Longitude |
179.15 (± 37.8
km)
|
Depth |
362 km (± 35 km) |
Depth Type |
free |
Earth Model |
iasp91 |
Used Phase Count |
38 |
Used Station Count |
23 |
Standard Error |
1.10 (s) |
Azimuthal Gap |
347.10 (degrees) |
Minimum Distance |
4.86 (degrees) |
Magnitudes
Type |
Magnitude |
Station Count |
Preferred (M) |
3.8 |
|
MLv |
4.0 (± 0.2) |
17 |
ML |
4.0 (± 0.2) |
7 |
mB |
4.1 (± 0.1) |
5 |
Mw(mB) |
3.2 (± 0.4) |
5 |
M |
3.8 |
17 |
GeoNet combines magnitudes into a summary magnitude, M, which consists of a weighted average of the individual magnitudes and attempts to be a best possible compromise between all magnitudes for a range of earthquake sizes.
Summary magnitude for GeoNet is then defined as:
M = (2 * MLv + (0.4 * number_of stations(Mw(mB)) - 1) * Mw(mB)) / (2 + (0.4 * number_of_stations(Mw(mB)) - 1))
Where MLv is local magnitude calculated on the vertical component and Mw(mB) is a Mw estimation based of mB by Bormann and Saul (2008).